Summary Information (click on this NSN number for detailed information: 4730-00-001-3957)
Adapter, also referenced with federal logistics item name code 22674:
An adapter having standard pipe threads on one end or an unthreaded end designed to accommodate a pipe. the other end has external or internal machine threads (straight threads other than pipe or hose series) and is designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. it is designed to join a pipe or pipe fitting to a boss or boss fitting in a straight line on items such as tanks, housing, valve fittings, or the like. see also adapter bushing and coupling, pipe.